Batrachospermum Occurrence:- (1) Batrachospermum is fresh water alga. (2) It is found in clear, cool, and running streams. (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green. (4) The intensity of light changes the color of pigments. (5) The thallus is attached to the substratum. Vegetative structure (1) The thallus of an adult plant is soft, thick, filamentous. (2) It is freely branched and gelatinous. (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth are developed on this axis. (4) These branches are filamentous and dichotomously arranged. (5) The main axis is corticated. It consists of a row of elongated cylindrical cells. (6) It is differentiated into nodes and internodes. (7) There are two types of branches that arise from the nodes: Branches of limited growth Branches of unlimited growth Batra
Osmoregulation in Pisces Osmoregulation :- Maintance of Internal body Concentration of salt ,minerals and water with the respective surrounding ,this process is called Osmoregulation. Osmoregulation Isotonic Solution :- The Concentration of two Solutions are equal with respect to each other is called Isotonic Solution. Hypotonic Isotonic Hypertonic Hypotonic Solution :- The Conentration of One solution is lower than other solution ,the lower one is called Hypotonic solution . Hypertonic Solution :- The concentration of on solution is greater than other solution ,the greater one is called Hypertonic solution. Poikilosmotic Animals :- The organisms which has change their internal state by exchanging the mineral ,salts and water with surrounding .There are of two types – Stenohaline (2) Euryohaline 1 Stenohaline :- The organism which can maintain their internal stat